Using knife project method to make a shape into the mesh
Try to start with more simplified geometry connected without n-gons.

Start with 10 sided Circle and continue extrude, scale, as needed)
Use Subdivision Surface modifier to round curved parts
and Edge Crease Shift+E 1 to keep corners sharp.

Similar to this.


Note: I probably used too low topology, when I would like to bevel edges now, I would have to add another loops (alternatively use bevelling on shader level).